Hi, Since python3.11 mocks can no longer be provided as the specs for other Mocks. As a result, an already-mocked object cannot be passed to mock.Mock(). This can uncover bugs in tests since these Mock-derived Mocks will always pass certain tests (e.g. isinstance) and built-in assert functions (e.g. assert_called_once_with) will unconditionally pass.[1] There's a bug report to track this issue in Cinder [2] but I think this may affect other projects too. I've reproduce the error and most drivers fail with: ``` unittest.mock.InvalidSpecError: Cannot spec a Mock object. [object=<Mock name='mock.client.HPE3ParClient' id='139657768087760'>] ``` Cheers, Sofia [1] https://github.com/python/cpython/issues/87644 [2] https://bugs.launchpad.net/cinder/+bug/2000436 -- Sofía Enriquez she/her Software Engineer Red Hat PnT <https://www.redhat.com> IRC: @enriquetaso @RedHat <https://twitter.com/redhat> Red Hat <https://www.linkedin.com/company/red-hat> Red Hat <https://www.facebook.com/RedHatInc> <https://www.redhat.com>